使用mfc的动态菜单

时间:2010-09-09 03:24:07

标签: c++ mfc

我想在我的主菜单中添加一个菜单项,然后在运行时用项填充它。我该怎么做?除了添加项目之外,我怎么会为他们提供消息映射条目,因为我不知道id?

4 个答案:

答案 0 :(得分:18)

您可以像这样动态创建CMenu对象:

CMenu *menu = new CMenu;
menu->CreatePopupMenu();
// Add items to the menu
menu->AppendMenu(MF_STRING, menuItemID, "Text");
...

然后将此子菜单添加到主菜单:

wnd->GetMenu()->AppendMenu(MF_POPUP, (UINT_PTR)menu->m_hMenu, "Menu Name");

对于消息映射,假设所有菜单项ID都在一定范围内,您可以使用ON_COMMAND_RANGE将整个范围映射到单个函数。此函数将接收ID作为参数,并且在函数内,您可以根据ID执行不同的操作。

答案 1 :(得分:9)

define the menu's using #define

#define ID_SHOW   2002
#define ID_HIDE   2004

//create a menu object for main menu
CMenu *menu    = new CMenu();
menu->CreateMenu();

//another menu object for submenu
CMenu *subMenu = new CMenu();
subMenu->CreatePopupMenu();
subMenu->AppendMenu(MF_STRING, ID_HIDE, _T("four"));
subMenu->AppendMenu(MF_STRING, ID_SHOW, _T("three"));
//append submenu to menu
menu->AppendMenu(MF_POPUP|MF_STRING, (UINT)subMenu->m_hMenu,  _T("Advanced") );
SetMenu(menu);

答案 2 :(得分:1)

  CMenu menuPopup;
  menuPopup.LoadMenu(IDR_CNTXT_PLAN);
subMenu.CreatePopupMenu();
 subMenu.AppendMenu(MF_STRING, MENU1,"Menu1");
subMenu.AppendMenu(MF_STRING, MENU2,"Menu2");
CMenu* pMenu = menuPopup.GetSubMenu(0);
  pMenu->InsertMenu(0,MF_BYPOSITION|MF_POPUP,(UINT)subMenu.m_hMenu,"Layers");
  menuPopup.GetSubMenu(0)->InsertMenu(1,MF_BYPOSITION|MF_SEPARATOR,0,"");
menuPopup.GetSubMenu(0)->TrackPopupMenu(TPM_LEFTALIGN, point.x, point.y, this);

答案 3 :(得分:0)

以下示例如果您希望动态添加菜单项并将数据附加到该菜单项。

    struct MyStruct
    {
        int abc;
    };
    CMenu MyMenu;
    MyMenu.CreatePopupMenu();

    CMenu MyMainMenu;
    VERIFY(MyMainMenu.LoadMenu(IDR_MAIN_MENU_ID));
    MyMainMenu.InsertMenu(0, MF_POPUP, (UINT_PTR)MyMenu.m_hMenu, _T("Main Menu"));

    const int iMenuAdds = 5;
    for (int i = 0; i < iMenuAdds; ++i)
    {
        MyStruct myStruct;
        myStruct.abc = i+10001;

        CString MenuDesc;
        MenuDesc.Format(_T("MenuNo: %d"), i);
        MENUITEMINFO tmpItem;
        tmpItem.fMask = MIIM_STRING | MIIM_ID | MIIM_DATA;
        tmpItem.fType = MFT_STRING;
        tmpItem.fState = MFS_ENABLED;
        tmpItem.wID = i + 101; //See note 1. below.
        tmpItem.dwItemData = (ULONG_PTR)&myStruct; //data set.
        tmpItem.dwTypeData = MenuDesc.GetBuffer(); //string description
        tmpItem.cch = MenuDesc.GetLength();
        tmpItem.cbSize = sizeof(tmpItem);
        MyMenu.InsertMenuItem(i, (LPMENUITEMINFO)& tmpItem, FALSE);
    }

要检索菜单项和相关数据:

CMenu* pPopup = &MyMenu; //or CMenu* pPopup = MyMainMenu.GetSubMenu(0); depending on parent.
ULONG_PTR lRetVal = pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON | TPM_RETURNCMD, point.x, point.y, this, NULL);
//^^lRetVal should return same value as tmpItem.wID above.

MENUITEMINFO tmpItem;
tmpItem.cbSize = sizeof(MENUITEMINFO);
tmpItem.fMask = MIIM_STRING | MIIM_ID | MIIM_DATA;
tmpItem.fType = MFT_STRING;
TCHAR dwTypeData[256];
tmpItem.dwTypeData = dwTypeData;
tmpItem.cch = 256;
pPopup->GetMenuItemInfo(lRetVal, &tmpItem, FALSE);
MyStruct *myStruct = (MyStruct*)tmpItem.dwItemData; //and now we have our data.
  1. 用作您的#define并可以用于ON_COMMAND_RANGE(idFirst,idLast,Function),因此,如果您打算使用ON_COMMAND_RANGE,则仍需要具有某种已定义范围。或者:use command range for dynamic menu或在数据集中创建您自己的数据。还需要确保使用的任何范围都不会与同一或父菜单上的任何#defined菜单项冲突。

在上面添加了该内容,因为我发现该线程由于存在问题而无法进行谷歌搜索,并且我已经在使用接受的答案方法来添加菜单项。